STEM EAD expiry , H4 EAD pending due to Covid delay

Hi my STEM EAD is expiring on Aug 25th 2020. Filed for H4 COS and h4 EAD in feb 2020 to avoid processing delays. Biometric for COS postoned to unknown date due to covid though I received email for biometric. From experience could you please let me know if my h4 cos and h4 EAD gets approved before my STEM EAD expiry Aug 25th. Also are there any amendments in my kind of situation if approval is not done before Aug 25th regarding contuation of work. Please suggest what could be done in this situtation to not to lose employment after Aug 25th